Clasification Society Rules and Regulations - Rules and Regulations for the Classification of Offshore Units, January 2016 - Part 4 STEEL UNIT STRUCTURES - Chapter 7 Watertight and Weathertight Integrity and Load Lines - Section 3 Installation layout and stability
Section 3 Installation layout and stability
3.1 Control rooms
3.1.1 Control rooms essential for the safe operation of the unit in an emergency are to be situated above zones of immersion after damage, as high as possible and as near a central position on the unit as is practicable. The requirements for the central ballast control station on column-stabilised units are to be in accordance with Pt 6, Ch 1, 2.8 Ballast control systems for column-stabilised units
3.2 Damage zones
3.2.1 The extent of defined damage is to be in accordance with the applicable damage stability Regulations.
3.2.2 All piping, ventilation ducts and trunks, etc. should, where practicable, be situated clear of the defined damage zones. When piping, ventilation ducts and trunks, etc. are situated within the defined extent of damage, they are to be assumed damaged and positive means of closure are to be provided at watertight subdivisions to preclude progressive flooding of other intact spaces, see also Pt 5, Ch 13, 2 Construction and installation of the Rules for Ships.
3.2.3 In addition to the defined damages referred to in Pt 4, Ch 7, 3.2 Damage zones 3.2.1, compartments with a boundary formed by the bottom shell of the unit are to be considered flooded individually unless agreed otherwise with LR.
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